Leave Marsa Alam around midnight in an air-conditioned coach (comfort stops en-route, total ride ~9 h) and spend a packed day in Cairo. Choose one of three itineraries: Program 1 – Islamic & Christian Cairo + Giza Pyramids (Mon Tue Wed Sat, $95 adult / $50 child): stroll the narrow lanes of Coptic Cairo to the Hanging Church, step inside the Amr ibn al-As Mosque, then stand before the Great Pyramid, Khafre, Menkaure and the Sphinx on the Giza Plateau. Program 2 – Giza Pyramids + National Museum (daily, $105 adult / $55 child): explore Tutankhamun’s treasures in Egypt’s new National Museum, photograph the pyramids and Sphinx, and stop at an essential-oil workshop before driving south. Program 3 – Super Cairo (Tue Wed Sat, $110 adult / $60 child): combines the highlights of Programs 1 & 2 plus a short Nile boat cruise, skipping souvenir shops to maximise sightseeing time. All options include licensed guide, buffet lunch, entrance tickets and return transfer; you arrive back in Marsa Alam about 21:00 with a head full of pharaonic wonders.